OK cheers mate! when I first got my hcigar Caravela I put a little smear of vaselene on all of the threads and in the surfaces of the switch as I would with the Provari , but after a week or two the switch became pretty crappy to use. I guess that it attracted dirt and dried out or whatever.
But after giving all the parts a good polishing with brasso, it's working even better than it did new! the action of the bottom button switch and the locking ring is super buttery smooth. I'm still considering the switch magnets from fat daddy vapes, but postage cost is ridiculous so I'm holding out or may ring Midland vapes to see if they could post them out cheaper.